Metallic floor grid



METALLIC `FLOOR GRID Filed July 5l, 1931 000 0000I L0 03; @8838@ g@ 'f5O "I6 IQC,[{ /Z 'Q OA Q O C f2 Q@ f7 090 00@ f3 O 3 O 3 O A TTORNEY.

INP .'.NTOR. l

Edward WBurgelss f Patented June 13, 1933 UNITED STATES PATENT OFFICEEDWARD W. BURGESS, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO A. O. SMITHCORPO- RATION, OF MIIVAUKEE, WISCONSIN, A CORPORATION 0F NEW YORKMETALLIC FLOOR GRID Application led July 31,

Thisinvention relates broadly to metallic floor grids, such as disclosedin my former Patent No. 1,765,652 issued June 24, 1930,

for embedding in a floor or pavement and to increase the wear resistingquality of the tread surface thereof.

More specifically the invention relates to means for securing adjacentgrid sections together, and to a flooring or pavement com-` m posed of aplurality of grid sections secured together by such means.

In the drawing which illustrates a preferred embodiment of theinvention:

I Figure l'illustrates diagrammatically the i5 arrangement of aplurality of grid sections constituting a portion of a floor or pavementprior to the pouring of cement, concrete or other paving material aroundthe grids, and also illustrates the arrangement of the clips 30 forsecuring the grid sections together;

Fig. 2 is an enlarged detail view of portions of two grid sectionsshowing the manner of securing the two together;

Fig. 3 is a sectional view taken on a plane indicated by the line 3 3 inFig. 2; and

Fig. 4 is a perspective view of one of the clips.

In preparing a wear resisting grid for incorporation in a floor orpavement, a plurality of grid sections are arranged in staggeredrelation as shown in Fig. 1 of the drawing and are secured together bymeans of clips 11.

Each of the grid sections 10 is made of a single piece of sheet'metal ina manner such as described in the patent vabove referred to, andcomprises a plurality of longitudinal rows of paving material receivingrings or cups 12 which are secured together and maintained in spacedrelation by means of webs 13. Each of the cups is provided with aplurality of'depending projections 14 for increasing the bond betweenthe grid and the paving material. As shown in Fig. 2 of the drawing, theindividual cups of alternate longitudinal rows are staggered, therebyproviding rows of cups at diagonals to the longitudinal rows in eachsection.

The c-lip 11 for securing adjacent sections together comprises achannel'shaped member 1931. seriai no. 554,275.

having a web and side flanges 16. Struck down kfrom web 15 are aplurality of aligned retaining tongues 17 which are spaced from the web15 a distance substantially equal to the thickness of the connectingwebs 13 of the grid sections. The outer free ends of the tongues arebent down slightly as at 18 to facilitate entry of the connecting webs13 into the space lbetween the web 15 and the tongues 17 when the clipsare driven into 60 retaining position. The width 'of the'clips 11 issubstantially equal to the width of the space between adjacent rows ofcups and the flanges 16 are not as high as the cups.

In preparing grid sections, such as illustrated in Fig. -2, forincorporation in flooring or pavement, the grid sections are firstarranged with the rows of cups of adjacent sections in substantialalignment. A clip 11l is then placed across the line of division of thetwo sections and between adjacent diagonal rows of cups of one sectionand corresponding rows of cups of the adjacent section with the tongues17 of the clip disposed within the spaces between the connecting webs13,and the web 15 of the clips resting upon the connecting webs 13. Sincethe width of the clip 11 is substantially equal to the space betweenadjacent rows of cups, the diagonal rows of cups of adjacent sectionswill be B0 brought into proper alignment. The clip is then drivenlongitudinally to position the various connecting webs 13 between thetongues 17 and the web 15 of the clips. The diagonal rows of cupsextending in one direction will not only be aligned, but the upper edgesof the cups will be brought into substantially the same horizontalplane.

Another clip 11 is then disposed across the division line of theadjacent sections, but is so positioned as to extend in a diagonal lineopposite to the diagonal line in which the first clip was positioned andit is then driven longitudinally in a manner similar to that describedin connection with the first clip. By having the two clips disposeddivergently with respect to each other, the last longitudinal row of'one section is aligned with the first longitudinal row of the secondsection in addition to aligning the diagonal rows of the two sections.The clips also act as a reenforcement for the floor or pavement toprevent cracking thereof along lines of division between adjacent grids.

rlhe ends of the adjacent grid sections are secured together by means ofclips 11 extending at right angles to the line of division of thesections. As shown in Fig. 1, it will be clear that any size paving gridmay be built up of a plurality of sections in a manner above described,and that the longitudinal and transverse or diagonal rows of cups willall be accurately aligned and the upper wear resisting edges of the cupswill be brought into substantially the same plane.

After the grid has been built up, the concrete, cement, terrazzo, orother paving or floor material is poured in and around the gridv andleveled oic substantially flush with the tops of the cups. The depth ofthe clips being less than the depth of the cups, the latter will becovered over by the paving material leaving only the upper edges of thecups showing on the tread surface of the pavement.

Although the clips 11 have been described in connection with theparticular floor grid shown, it is to be understood that the clips canbe used with any form of grid which has equally spaced webs or similarparts with which the tongues 17 may cooperate and it is to be furtherunderstood that various modiications may be resorted to withoutdeparting from the scope or spirit of the invention.

What is claimed and desired to be secured by Letters Patent is l. A wearresisting grid for pavements composed of a plurality of grid sections,each having longitudinal and transverse rows of material receiving cupsand webs connecting the cups and maintaining the same in spacedrelation, and clips extending across the lines of division of adjacentgrid sections for securing the same together, said clips being disposedbetween adjacent rows of cups of one section and corresponding adjacentrows of cups of an adjacent section for properly aligning and spacingthe longitudinal and transverse rows of cups of the several sections.

2. A wear resisting grid for pavements composed of a plurality ofgridsections, each having longitudinal and transverse rows of materialreceiving cups and webs connecting the cups and maintaining the same inspaced relation, and clips extending across the lines of division ofadjacent grid sections for securing the same together, said clips eachhaving a plurality of retaining tongues engaging the connecting websbetween cups and being disposed between adjacent rows of cups of onesection and corresponding adjacent rows of cups of an adjacent sectionfor properly aligning and spacing the longitudinal and transverse rowsof cups of the several sections and causing the upper wear resistingedges of the cups to lie in substantially the same plane.

8. A wear resisting grid for pavements composed of a plurality of gridsections, each having longitudinal and transverse rows of materialreceiving cups and webs connecting the cups and maintaining the same inspaced relation, and clips extending across the lines of division ofadjacent gridl sections for securing the same together, said clips eachhaving a pluralityof retaining tongues engaging the connecting websbetween cups, being of a width substantially equal to the width of thespace between adjacent rows of cups and being disposed between adjacentrows of cups of one section and corresponding adjacent rows of cups ofan adjacent section for properly aligning and spacing the longitudinaland transverse rows of cups of the several sections and causing theupper wear resisting edges of the cups to lie in substantially the sameplane.

4;. A wear resisting grid for pavements composed of a plurality of gridsections, each having longitudinal and transverse rows of materialreceiving cups and webs connecting the cups and maintaining the same inspaced relation, and clips extending across the lines of division ofadjacent grid sections for securing the same together', said clips beingdisposed between adjacent transverse rows of cups of adjacent gridsections for aligning the transverse rows of one section with thetransverse rows of the adjacent section and properly spacing the lastlongitudinal row of cups of one section with the rst longitudinal row ofthe adjacent section.

Y 5.- A wear resisting grid for pavements composed of a plurality ofgrid sections each having longitudinal rows of material receiving cupsand webs connecting the cups and maintaining thesame in spaced relation,the cups ot alternate rows being staggered to provide rows of cups ineach section at a diagonal with respect to 'the longitudinal rows ofcups, and clips extending across the lines of division of adjacent ,gridsections for securing the same together, said clips being disposedbetween adjacent diagonal rows oi cups of adjacent grid sections foraligning diagonal rows of cups of' one section with diagonal rows ofcups of an adjacent section and properlyl spacing the last longitudinalrow of cups of one section with the first longitudinal row of the adjacent section.

6. A wear resisting grid for pavements composed of a plurality of gridsections' each having longitudinal rows of material receiving cups andwebs connecting the cups and maintaining the same in spaced relation,the cups of alternate rows being staggered to provide rows of cupsin-each section at a diagonal with respect to the'longitudinal rows ofvcups, and clips extending across the linesof` division of adjacent gridsections for securing the same together, said clips being disposedbetween adjacent diagonal and longitudinal rows of cups of one sectionand corresponding rows of adjacent sections for aligning and properlyspacing the rows of cups of the sections.

7. A wear resisting grid for pavements composed of a plurality of gridsections each having longitudinal rows of material receiving cups andwebs connecting the cups and maintaining the same in spaced relation,the cups of alternate rows being staggered to provide rows of cups ineach section at a diagonal with respect to the longitudinal rows ofcups,

and clips extending across the lines of division of adjacent gridsections for securing the same together, said clips each having aplurality of retaining tongues engaging the connecting webs between cupsand being disposed between adjacent diagonal and longitudinal rows ofcups of one section and corresponding adjacent rows of adjacent sectionsfor aligning and properly spacing the longitudinal and diagonal rows ofcups of the sections.

8. A wear resisting grid for pavements composed of a plurality of gridsections each having longitudinal rows o material receiving cups andwebs connecting the cups and maintaining the same in spaced relation,the cups of alternate rows being staggered to provide rows of cups ineach section at a diagonal with respect to the longitudinal rows ofcups, and clips extending across the lines of division of adjacent gridsections for securing the same together, said clips each having aplurality of retaining tongues engaging the connecting webs between cupsand being of a width substantially equa-l to the Width of the spacebetween adjacent rows of cups and being disposed between adjacentdiagonal and longitudinal rows of cups of one section and correspondingadjacent rows of adjacent sections for aligning and properly spacing thelongitudinal and diagonal rows of cups of the sections.

9. A clip for securing together floor grid sections having aligned rowsof material receiving cups, said clips comprising a sheet metal striphaving a plurality of aligned tongues struck down from one side thereofand extending in the same direction longitudinally of the clip forengaging corresponding parts of adjacent sections and being of a widthsubstantially equal to the width of the space between adjacent rows ofcups.

. In witness whereof I have signed my name at Milwaukee, Wisconsin, this28th day of Ju1y,19s1.

EDWARD w. BUReEss.

